There are people who can find it difficult to read a label no matter how clearly this has been printed, or to what lengths the product manufacturer has gone to and make sure it is understood. A lot of people in this country have come from abroad and the more elderly have may not learned our language, relying perhaps on younger members of the family to explain instruction or read English to them. This is one reason why putting illustrated instructions on a medication or dental rinse for example can be important.
Illustrating how to use a mouthwash for instance does not have to be drawn in a manner which would bring accolades from the Nation Gallery, simple line drawings is often all that is required. Simple pictures with a numbered sequence and the wording below the drawing will provide information on how to use the product. Of course this in itself is not enough and statutory requirement such as the ingredients and safety information must still be printed. The illustrations and statutory requirement will usually occupy the label on the back of the product, leaving the front printed label to attract the customer to the product.